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Method for high-value and non-waste utilization of cyanidation slag

A technology of high-value cyanidation tailings, applied in the direction of solid waste removal, etc., can solve the problem of not considering emission reduction and other problems, and achieve the effect of high product technical indicators and no waste discharge.

Active Publication Date: 2013-07-24
北京中科金瀚科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, there are some patented technologies for extracting sulfur and iron elements from cyanidation tailings, which have certain limitations in terms of chemical cost, process flow, and technical indicators.
The Chinese invention patent with the publication number CN101214470A introduces "a method for recovering copper, lead and zinc in cyanide tailings by flotation with cyanide barren liquor", which extracts copper, zinc and lead from cyanide tailings. The various press liquids in the filter, i.e. poor cyanide liquid, are returned as slurry replenishment liquid, and the grade of sulfur concentrate is only 35%, and the reduction of highly toxic gas HCN in the re-acidification process is not considered. Troubleshooting

Method used

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  • Method for high-value and non-waste utilization of cyanidation slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The chemical composition of a gold mine cyanide tailings filter cake is as follows:

[0040] Table 1. Element content (%) of a gold mine cyanide tailings filter cake

[0041] the element

S

Fe

Cu

Zn

Pb

As

content

28.26

25.36

0.14

0.15

0.21

0.011

[0042] (1) Add water to the fine-grained refractory high-pollution cyanide tailings through the Cu, Zn, Pb multi-element recovery process and stir in the stirring tank for 10min, the pulp concentration is 30%, add 6wt% dilute sulfuric acid in the pulp and stir for 2min, adjust pH = 5, form A pulp, add 10wt% functional composite sol 500g / tt to A pulp and stir for 2min to form B pulp, first add 240g / t butyl xanthate to B pulp and stir for 2min, then add pinitol oil 20g / t and stirred for 2 minutes to form C pulp, fill the C pulp with air from the bottom of the stirring tank and continue to stir for 1 minute, conduct a rough separation for 10 minu...

Embodiment 2

[0056] The chemical composition of a gold mine cyanide tailings filter cake is as follows:

[0057] Table 3. Element content (%) of a gold mine cyanide tailings filter cake

[0058] the element

S

Fe

Cu

Zn

Pb

As

content

28.26

25.36

0.14

0.15

0.21

0.011

[0059] (1) Add water to the fine-grained refractory high-pollution cyanide tailings through Cu, Zn, Pb multi-element recovery process and stir in the stirring tank for 15min, the pulp concentration is 33%, add 6wt% dilute sulfuric acid in the pulp and stir for 6min, adjust pH = 6, form A pulp, add 10wt% functional composite sol 750g / t to A pulp and stir for 6 minutes to form B pulp, first add butyl xanthate 360g / t to B pulp and stir for 6 minutes, then add pinitol oil 40g / t and stirred for 6min to form C pulp, fill the C pulp with air from the bottom of the stirring tank and continue stirring for 1min, conduct a rough separation for 15min, scr...

Embodiment 3

[0073] The chemical composition of a gold mine cyanide tailings filter cake is as follows:

[0074] Table 5. Element content (%) of a gold mine cyanide tailings filter cake

[0075] the element

S

Fe

Cu

Zn

Pb

As

content

28.26

25.36

0.14

0.15

0.21

0.011

[0076] (1) Add water to the fine-grained refractory high-pollution cyanide tailings through Cu, Zn, Pb multi-element recovery process and stir in the stirring tank for 20min, the pulp concentration is 35%, add 6wt% dilute sulfuric acid in the pulp and stir for 10min, adjust pH=7, form A pulp, add 10wt% functional composite sol 1000g / t to A pulp and stir for 10min to form B pulp, first add 480g / t butyl xanthate to B pulp and stir for 10min, then add pinitol oil 60g / t and stirred for 10 minutes to form C pulp, fill the C pulp with air from the bottom of the stirring tank and continue to stir for 2 minutes, conduct a rough separation for 20 minut...

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Abstract

The invention discloses a method for the high-value and non-waste utilization of cyanidation slag and belongs to the technical field for the resource utilization of metallurgical slag. The method comprises: a process of separating rich sulfur and iron elements from the cyanidation slag, a process of roasting high-quality pyrite concentrate to prepare sulfuric acid and coproduce high purity iron powder, a process of extracting gold from the high purity iron powder, and a process of treating the three wastes. The method has the advantages of effective treatment of waste gas, waste water and waste slag discharged from the whole process and realizing the non-waste discharge.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of metallurgical waste residues, in particular to a method for high-value waste-free utilization of cyanidation tailings. Background technique [0002] Among the many methods and processes of gold dressing and smelting, cyanide leaching and gold extraction is the main method of gold dressing and smelting in the world. Since its application in 1887, the cyanidation gold extraction process has been widely used due to its high recovery rate, strong adaptability to ore, simple process operation, low cost, and avoidance of gold ore transportation losses. By 2001, 80% of the world's All new gold mines use the cyanidation method to extract gold. my country's gold output in 2009 was 313.9 tons, ranking first in the world for three consecutive years. In my country, the cyanidation method is widely used in gold production because of its simple operation, low cost and good mineral selectivity....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00B09B3/00
Inventor 叶树峰李青春钱鹏陈运法孙建伟尹世波
Owner 北京中科金瀚科技有限公司
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